[, ] () a situation where individual buyers and sellers can influence the price of goods, for example if there are only a few sellers, buyers do not have enough information about products and prices, or there are not enough goods of the same type produced 不完全市场（个别买方和卖方能影响产品的价格）◆Health care is an imperfect market, and does not follow the classic rules of supply and demand. 保健市场属於不完全市场，不跟随经典供求规则。